Error when running starting server on Linux.

Horizon96

New Member
May 29, 2022
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Hi, trying to get Direwolf20 1.18 server to run on Linux, I ran the server installer and that works fine. However trying to get the start.sh command to work and I get the following error everytime:

jack@jack-linux-srv:/mnt/sda/SharedMedia2/Direwolf20$ sudo ./start.sh
grep: eula.txt: No such file or directory
Do you agree to the Mojang EULA available at https://account.mojang.com/documents/minecraft_eula ?
[y/n] y
Error: Unable to access jarfile insert-jar-here.jar

I assume I'm meant to change the insert-jar-jere.jar to something else within start.sh, so I tried changing it to minecraft_server.1.18.2.jar however that just causes another error.


jack@jack-linux-srv:/mnt/sda/SharedMedia2/Direwolf20$ sudo ./start.sh
Error: A JNI error has occurred, please check your installation and try again
Exception in thread "main" java.lang.UnsupportedClassVersionError: net/minecraft/bundler/Main has been compiled by a more recent version of the Java Runtime (class file version 61.0), this version of the Java Runtime only recognizes class file versions up to 52.0
at java.lang.ClassLoader.defineClass1(Native Method)
at java.lang.ClassLoader.defineClass(ClassLoader.java:756)
at java.security.SecureClassLoader.defineClass(SecureClassLoader.java:142)
at java.net.URLClassLoader.defineClass(URLClassLoader.java:473)
at java.net.URLClassLoader.access$100(URLClassLoader.java:74)
at java.net.URLClassLoader$1.run(URLClassLoader.java:369)
at java.net.URLClassLoader$1.run(URLClassLoader.java:363)
at java.security.AccessController.doPrivileged(Native Method)
at java.net.URLClassLoader.findClass(URLClassLoader.java:362)
at java.lang.ClassLoader.loadClass(ClassLoader.java:418)
at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:352)
at java.lang.ClassLoader.loadClass(ClassLoader.java:351)
at sun.launcher.LauncherHelper.checkAndLoadMain(LauncherHelper.java:601)

Java versions are the following

jack@jack-linux-srv:~$ java -version
openjdk version "1.8.0_312"
OpenJDK Runtime Environment (build 1.8.0_312-8u312-b07-0ubuntu1~21.10-b07)
OpenJDK 64-Bit Server VM (build 25.312-b07, mixed mode)

Just no idea what to try next, any help would be much appreciated.